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United States Patent | 5,664,397 |
Holz | September 9, 1997 |
A sandwich plate has a pair of relatively dense, stiff, thin, and generally parallel longitudinally extending skins, and a less dense core body having a pair of generally parallel faces bonded to the skins and formed with longitudinal and transverse cavities connected together in a Z-shape and forming central longitudinally extending tongues.
Inventors: | Holz; Rudiger (Worthsee, DE) |
Assignee: | Krauss-Maffei Verkehrstechnik GmbH (Munich, DE) |
Appl. No.: | 606489 |
Filed: | March 4, 1996 |
Mar 18, 1995[DE] | 195 09 972.9 |
Current U.S. Class: | 52/794.1; 52/144; 52/145; 52/309.9; 52/793.1; 181/294; 296/187.02; 296/191 |
Intern'l Class: | E04C 002/34; 309.16; 309.7; 784.11; 784.15 |
Field of Search: | 52/309.8,309.9,783.1,793.1,794.1,795.1,505,323,787.11,787.12,145,144,309.14 296/191,901,900 181/294,288,284 |
2117397 | Jun., 1938 | Bonsall | 52/794. |
2728702 | Dec., 1955 | Simon et al. | 52/309. |
2960196 | Nov., 1960 | Meserole | 52/794. |
3028278 | Apr., 1962 | Gronemeyer | 52/793. |
3232017 | Feb., 1966 | Prusinski et al. | 52/794. |
3239982 | Mar., 1966 | Nicosia | 52/309. |
3412513 | Nov., 1968 | Gosele | 52/144. |
3608264 | Sep., 1971 | Jones et al. | 52/144. |
3626044 | Dec., 1971 | Arnaud | 52/309. |
3791912 | Feb., 1974 | Allard | 52/309. |
3903663 | Sep., 1975 | Bainter. | |
4369608 | Jan., 1983 | Miura et al. | 52/309. |
4513041 | Apr., 1985 | Delluc | 181/294. |
4555134 | Nov., 1985 | Gruna. | |
5258585 | Nov., 1993 | Juriga | 181/294. |
Foreign Patent Documents | |||
2376925 | Sep., 1978 | FR | 52/309. |
763 356 | Jun., 1953 | DE. | |
904461 | Feb., 1954 | DE | 52/145. |
70 794 | Jan., 1970 | DE. | |
31 16 938 | Nov., 1982 | DE. | |
86 24 313 | Dec., 1986 | DE. | |
35 46 050 | Jul., 1987 | DE. | |
39 27 538 | Feb., 1991 | DE. | |
39 32 121 | Apr., 1991 | DE. | |
91 05 019 | Aug., 1991 | DE. | |
41 07 285 | Sep., 1992 | DE. | |
93 19 082 | Mar., 1994 | DE. | |
484114 | Dec., 1975 | SU | 296/191. |
754299 | Aug., 1956 | GB | 52/309. |